Stephen D. Patek

Associate Professor

Systems and Information Engineering

School of Engineering and Applied Science

University of Virginia

Contact Information:

PO Box 400747

151 Engineers Way

Charlottesville, VA 22904

Phone: 434-982-2052

Fax: 434-982-2972

E-mail: patek AT virginia DOT edu


Research Interests:

  • Stochastic Optimization, Control, and Games
  • Diabetes Technology and Health Systems Models
  • Network Traffic Engineering



Stochastic Optimization, Control, and Games (selected):

  • S. D. Patek and D. P. Bertsekas, “Stochastic Shortest Path Games,” SIAM Journal on Control and Optimization, 37(3):804-824, 1999
  • S. D. Patek. “On Terminating Markov Decision Processes with a Risk Averse Objective Function.” Automatica, 37(9):1379–1386, 2001.
  • E. Campos-Nanez and S. D. Patek. “Dynamically Identifying Regenerative Cycles in Simulation-Based Optimization Algorithms for Markov Chains.” IEEE Trans Automatic Control, 49(6):1022–1025, 2004.
  • S. D. Patek. “Policy iteration type algorithms for recurrent state Markov decision processes.” Computers and Operations Research, 31(14):2333–2347, 2004.
  • S. D. Patek. “Partially Observed Stochastic Shortest Path Problems with Approximate Solution by Neuro-Dynamic Programming. IEEE Transactions on Systems, Man, and Cybernetics Part A, 37(9):710-720, 2007.
  • A. Garcia, S. D. Patek, and K. Sinha, “A Decentralized Approach for Discrete Optimization via Simulation: Application to Network Flow,” Operations Research, 55(4):717-732, 2007.
  • S. D. Patek, P. A. Beling, and Y. Zhao, “Natural Solutions for a Class of Symmetric Games,” Game Theoretic and Decision Theoretic Agents, AAAI Spring Symposium Technical Report SS-07-02, pp. 47-53, 2007.
  • Y. Zhao, S. D. Patek, and P. A. Beling, “Decentralized Bayesian Search using Approximate Dynamic Programming Methods,” IEEE Transactions on Systems, Man, and Cybernetics, 38(4):970-975, 2008.

Diabetes Technology and Health Systems Models (selected):

  • S. D. Patek, M. Breton, C. Dalla Man, C. Cobelli, B. Kovatchev, “Adaptive Meal Detection Algorithm for Enhancing Closed-Loop Control in Type 1 Diabetes,” abstract in the Diabetes Technology Meeting, 2007.
  • S. D. Patek, M. Breton, Y. Chen, C. Solomon, and B. P. Kovatchev, “Linear Quadratic Gaussian-Based Closed-Loop Control of Type 1 Diabetes,” Journal of Diabetes Science Technology, 1(6):834-841, 2007.
  • B. Kovatchev, M. Breton, S. Patek, C. Cobelli, “In Silico Testing and In Vivo Experiments with Closed Loop Control of Blood Glucose in Diabetes,” IFAC World Congress, 2008.
  • L. Magni, D. M. Raimondo, C. Dalla Man, M. Breton, S. Patek, G. De Nicolao, C. Cobelli, B. P. Kovatchev, “Evaluating the Efficacy of Closed-Loop Glucose Regulation via Control Variability Grid Analysis,” Journal of Diabetes Science and Technology, 2(4):630-635, 2008.
  • S. D. Patek, M. Breton, B. P, Kovatchev, “Rollout Policies for Control of Blood Glucose,” Extended abstract in the Latin-Ibero American Congress on Operations Research (CLAIO), 2008.
  • S. D. Patek, J. M. Carrier, T. W. Huguenor, O. Sener, T. J. Wu, “An Agent Model of CGM Adoption,” Abstract in the Diabetes Technology Meeting, 2008.
  • S. D. Patek, B. W. Bequette, M. Breton, B. A. Buckingham, E. Dassau, F. J. Doyle III, J. Lum, L. Magni, and H. Zisser, “In Silico Preclinical Trials: Methodology and Engineering Guide to Closed-Loop Control in T1DM,” Journal of Diabetes Science and Technology, 3(2):269-282, 2009.
  • J. Tipan Verella and S. D. Patek, “Toward and Agent-Based Patient-Physician Model for the Adoption of Continuous Glucose Monitoring Technology,” Journal of Diabetes Science and Technology, 3(2):345-352, 2009.
  • S. D. Patek, C. Hughes, M. Breton, and B. P. Kovatchev, “Anticipating Meals with Behavioral Profiles: Towards Stochastic Model Predictive Control of T1DM,” MCBMS 2009, Seventh IFAC Symposium on Biological and Medical Systems, Aalborg, Denmark, August 2009.
  • W. L. Clarke, S. Anderson, M. Breton, S. Patek, L. Kashmer, and B. Kovatchev, “Closed-Loop Artificial Pancreas Using Subcutaneous Glucose Sensing and Insulin Delivery, and a Model-Predictive Control Algorithm: The Virginia Experience,” Journal of Diabetes Science and Technology, 3(5):1031-1038, 2009.
  • B. Kovatchev, S. Patek, E. Dassau, F. J. Foyle III, L. Magni, D. De Nicolao, and C. Cobelli,  “Control to Range for Diabetes: Functionality and Modular Architecture,” Journal of Diabetes Science and Technology, 3(5):1058-1065, 2009.

Network Traffic Engineering (selected):

  • S. D. Patek and E. Campos-Nanez. “Pricing of Dialup Services: an Example of Congestion-Dependent Pricing in the Internet.” In Proc. IEEE Conf. Decision and Control (CDC 2000), pp. 2296–2301, 2000.
  • S. D. Patek, R. Venkateswaran, and J. Liebeherr. “Simple Alternate Routing for Differentiated Services Networks.” Computer Networks, 37(3-4):447–466, November 2001.
  • J. Wang, S. Patek, H. Wang, and J. Liebeherr. “Traffic engineering with AIMD in MPLS networks.” In Proceedings of PfHSN 2002, Lecture Notes in Computer Science Vol. 2334, pp. 192–210. Springer-Verlag, Dec. 2002.
  • E. Campos-Nanez and S. D. Patek. “On-line Tuning of Prices for Network Services.” In Proceedings of INFOCOM 2003, San Francisco, April 2003.
  • J. Liebeherr, S. D. Patek, and A. Burchard. “Statistical Per-Flow Service Bounds in a Network with Aggregate Provisioning.” In Proceedings of IEEE INFOCOM 2003, San Francisco, April 2003.
  • S. D. Patek, J. Liebeherr, and E. Yilmaz. Tradeoffs in Designing Networks with End-to-End Statistical QoS Guarantees. Telecommunications Systems, 23(1):9–34, June 2003.
  • Burchard, J. Liebeherr, and S.D. Patek, “A Min-Plus Calculus for End-to-End Statistical Service Guarantees,” IEEE Transactions on Information Theory, 52(9):4105-4114, 2006.
  • K. Zhu and S. D. Patek, “A Distributed, Utility-Based Architecture for Task Assignment in Tactical WSNs,” International Workshop on Wireless Sensor Network Architecture (WWSNA), in ACM SIGBED Review, pp. 43-48, 2007.
  • D. W. Lee, E. J. Bass, S. D. Patek, and J. A. Boyd, “A Traffic Engineering Model for Air Taxi Services,” Transportation Research E: The Logistics and Transportation Review, 44:1139-1161, 2008.
  • K. Zhu and S. D. Patek, “Evaluation of Overlay-Based Data Dissemination over Wireless Sensor Networks,” Proceedings of MILCOM 2008.
  • H. Yang and S. D. Patek, “Path Selection Based on Service Curve Measurement in MANETs” IEEE WCNC 2009, Budapest, April 2009.


Copyright: Stephen D. Patek. Last updated on 2 September 2009.